eSpace U1900 Unified Gateway Troubleshooting Cases

This document lists typical faults that occur during device operation and maintenance and solutions to those faults. The faults are categorized into voice call faults, trunk faults, service-related faults, and other faults. This document describes each fault in terms of its symptom, possible cause, and troubleshooting procedure. It provides 63 cases in total, 27 of which are newly added in this issue.

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